基于航空发动机叶片的全报废数据,建立了发动机叶片报废率威布尔分布模型,并运用中位秩的方法对威布尔模型的参数进行了求解。为验证所建立模型的有效性,运用某航空公司CFM56-7B航空发动机报废率数据对模型进行了验证,取得了较好的效果。所建立的报废率模型能够为航空发动机的送修目标确定、维修工作范围制定等提供理论的支持。 Based on the total scrap data of aeroengine blades, the Weibull distribution model of engine blade rejection rate was established and the parameters of Weibull model were solved by the method of median rank. In order to verify the validity of the model established, the model was verified by using the CFM56-7B aero-engine scrap data of a certain airline company, and achieved good results. The established scrap rate model can provide theoretical support for aero engine engine repair goal setting, maintenance work scope and so on.